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Application freezes and becomes unresponsive while using Fluent theme of PresentationFrameWork in .NET 90 project #10203

Description

@ushasundarajan

Description

We have updated all our controls to support NET 9.0. When using Fluent theme of PresentationFrameWork, the application freezes and becomes unresponsive within few seconds. The application runs fine while using other themes like Aero, Luna, Classic of PresentationFrameWork. We have previously reported similar issue related to custom themes and already reported in #10020 that crashes the application.

Tried the below code as well that was recommended:

The issue is replicating even after using this!

Reproduction Steps

We’ve attached samples project demonstrating this issue and video reference for Issue replication.

Replication Procedure:

  • Run the below sample
  • Right click on the search bar of PropertyGrid
  • See the application freezes and becomes unreponsive

Samples:

Issue replicating sample while using Fluent theme of PresentationFrameWork:
PropertyGridNet90.zip

Issue replicating videos:
https://github.com/user-attachments/assets/48cb5069-4dd9-4c03-b566-8349d23854b9

PropertyGrid_ThemeIssue.webm

Expected behavior

While right clicking the search bar while using Fluent theme the application should not freeze, and the context menu should be visible.

Actual behavior

While right clicking the search bar while using Fluent theme the application freezes and closes automatically within few seconds.

Regression?

No response

Known Workarounds

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Impact

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Configuration

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